Biologists have proposed a cubic polynomial to model the length L of rock bass at age A: L = 0.0155A3 - 0.372A2 + 3.95A + 1.21 where L is measured in inches and A in years. Calculate dL dA A = 15 (Round your answer to three decimal places.) dL dA LA = 15 x in/yr = -7.21 Interpret your answer. A 15-year old rock fish shrinks at a rate of 55.113 in/yr. O A 15-year old rock fish grows at a rate of 51.860 in/yr. O A 15-year old rock fish grows at a rate of 55.113 in/yr. O A 15-year old rock fish grows at a rate of 3.253 in/yr. O A 15-year old rock fish shrinks at a rate of 3.253 in/yr.

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.